Electric lamp and discharge devices: systems – Cathode ray tube circuits – Pulse storing
Patent
1975-11-12
1976-09-21
La Roche, Eugene
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Pulse storing
315 94, 315106, 315309, 3171575TV, 328270, H01F 1300
Patent
active
039821536
ABSTRACT:
An improvement for effecting rapid warm-up of the thermionic cathode means in a color CRT display device utilizing a degaussing circuit including a temperature responsive resistive element in series with the primary winding of an inductive means. A direct operational relationship is established between the degaussing and cathode heater circuits by having the secondary winding of the inductor series coupled therein. Upon simultaneous activation of both circuits, through a common switching means, a transitory surge of current is supplied by the degaussing circuit to the heater circuit, via the common inductor, to effect an accelerated temperature response in the heater.
REFERENCES:
patent: 3333143 (1967-07-01), Van Anrooy et al.
patent: 3358182 (1967-12-01), Bohnstedt
patent: 3534223 (1970-10-01), Murphy
patent: 3798493 (1974-03-01), Manske
patent: 3886401 (1975-05-01), Berg
Burdick Glen Alden
Zmuda Edward Izydor
GTE Sylvania Incorporated
La Roche Eugene
O'Malley Norman J.
Orner Robert T.
Rinn Frederick H.
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